Home / 21,415.02-32,159.29-13,143.61

Finding the Fourth Proportional to 21,415.02, 32,159.29 and 13,143.61

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Solution

The fourth proportional to 21,415.02, 32,159.29 and 13,143.61 is: 19,737.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.02 : 32,159.29 = 13,143.61 : x
  2. Step 2: Convert to fraction form
    21,415.02/32,159.29 = 13,143.61/x
  3. Step 3: Cross multiply
    21,415.02x = 32,159.29 × 13,143.61
  4. Step 4: Simplify right side
    21,415.02x = 422,689,165.64
  5. Step 5: Solve for x
    x = 422,689,165.64/21,415.02
  6. Step 6: Final answer
    x = 19,737.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.